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ee30e2586a
When predicitive commoning moves an invariant ref it makes sure to not build a MEM_REF with a base that is negatively offsetted from an object. But in trying to preserve some transforms it does not consider association of a constant offset with the address computation in DR_BASE_ADDRESS leading to exactly this problem again. This is arguably a problem in data-ref analysis producing such an out-of-bound DR_BASE_ADDRESS, but this looks quite involved to fix, so the following avoids the association in one more case. This fixes the testcase while preserving the desired transform in gcc.dg/tree-ssa/predcom-1.c. PR tree-optimization/118954 * tree-predcom.cc (ref_at_iteration): Make sure to not associate the constant offset with DR_BASE_ADDRESS when that is an offsetted pointer. * gcc.dg/torture/pr118954.c: New testcase. |
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